const order = { id: 7, toString() { return `Заказ №${this.id}`; } };
console.log(`${order}`, Object.prototype.toString.call([]));

const bill = { total: 440, valueOf() { return this.total; } };
console.log(bill + 60, bill > 400);

console.log((1250.5).toLocaleString("ru-RU"), [1000, 2000].toLocaleString("ru-RU"));

const price = {
  [Symbol.toPrimitive](hint) { return hint === "string" ? "220 ₽" : 220; }
};
console.log(`${price}`, price * 2);

class Order { get [Symbol.toStringTag]() { return "Order"; } }
console.log(Object.prototype.toString.call(new Order()));

console.log(true.toString(), new Boolean(false) ? "truthy!" : "falsy", new Boolean(false).valueOf());